Sub-rosa and Under cover

Sub-rosa adjective - Designed and carried out secretly or confidentially.

Under cover and sub-rosa are semantically related In some cases you can use "Under cover" instead an adjective phrase "Sub-rosa".

Sub-rosa and under cover are semantically related in secret topic. Sometimes you can use "Sub-rosa" instead an adjective phrase "Under cover", if it concerns topics such as sneaky, deceitful, underhand, stealthy.